The company is closing its Edinburgh centre at the end of June, and also made 91 staff redundant at Tipton and West Bromwich in May.
Solus said: "further redundancies are likely" at Edinburgh, which employs 14 staff, and Norwich, which has 19.
Solus will serve eastern customers from the Midlands.
PwC joint administrator Tony Barrell said: "The company is trading well, with a good level of sales".
Dog Rocks is the latest to cease its distribution agreement with Solus.